Do you actually need what bindpad brings to the table -- extra buttons beyond the 120 that you can get in the "standard" action bars, or the ability to make those invisible, or the extra macro capability? If not, you might find that either bartender4 or dominos work to solve the problem.

Beyond that, I can say that ion did not satisfy my desire to have macro-based action bars, as it was quite buggy. I understand the author has returned to the game, however, so it may see those issues fixed.

I just noticed that "Macro Toolkit", which I use for all sorts of other macro awesome, has a "keybind only" section, which allows to you put macros on keybinds without going through the normal action bar interface -- and without eating into your otherwise limited personal macro space. Might also meet your needs, depending on what you actually want to bind.